#include <stdio.h>

int sum(int start,int end)
{
    int ans = 0;
    for(int i = start;i <= end;i++)
    {
        ans += i;
    }
    return ans;
}
int div(int a,int b)
{
    return a / b;
}
int main()
{
    printf("%d\n",sum(1,10));
    div(1,0);
    return 0;
}
